相关实验视频
Updated: Jul 20, 2026
09:45
An Isolated Working Heart System for Large Animal Models
Published on: June 11, 2014
概括
编程电刺激在四名患者中揭示了复杂的上心室高心律动脉. 这些发现有助于更好地了解回归性心跳动脉的机制和电路局部化.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
背景情况:
- 腹腔上心跳动 (SVTs) 是一种常见的心律失常症.
- 了解重新进入的电路对于有效治疗至关重要.
- 编程电刺激 (PES) 是一个关键的诊断工具.
研究的目的:
- 在SVT患者中在PES期间呈现不寻常的发现.
- 为了阐明复杂的复杂机制的复发性心律障碍.
- 为了帮助定位重新进入电路.
主要方法:
- 进行了编程电刺激 (PES).
- 研究了四名患有脑上脑膜上下心跳动的患者.
- 记录和分析了不寻常的电生理学发现.
主要成果:
- 观察到:一个患者的两个SVT,A-V阻塞的速度加速,A-V阻塞的导电"差距"和由心室跳动启动的心房动脉.
- 在心脏导电通路中展示了复杂的相互作用.
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结论:
- PES可以在SVT中揭示复杂和非典型的模式.
- 这些发现有助于更深入地了解回归性心跳动脉机制.
- 通过识别这些现象,可以提高重新进入电路的精确定位.
相关概念视频
01:30Pulse rhythm
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
01:28Mechanism of Cardiac Arrhythmias
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
01:29Disturbances in Heart Rhythm
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
01:28Dysrhythmias II: Classification of Tachyarrhythmias
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
01:29Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.
01:18Dysrhythmias IV: Characteristics of Bradyarrhythmias
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...